Section 8. SPECIAL JUMPER AND DIP SWITCH SETTINGS
8.1 INTRODUCTION
Some RFL 9660 circuit card modules and assemblies are equipped with programmable jumpers and DIP
switches. These jumpers and DIP switches are set at the factory to a configuration that should work in most
applications. Under normal circumstances, they will only have to be reset in the field if the factory settings are
not compatible with your equipment. The information in this section allows you to set these jumpers and DIP
switches to match the equipment requirements of your specific installation.
8.2 CPU MODULE
The CPU module has three programmable jumpers (J2 through J5) and two programmable DIP switches (S1
and S3).
Figure 8-1 shows the location of these jumpers and switches. S1 can be accessed through the front panel. S3
and jumpers J2 through J5 can only be accessed when the CPU is removed from the RFL 9660 chassis.
J2 - J5 Jumpers J2 through J5 are set at the factory according to the memory devices installed on
the circuit board. These jumpers should not be changed in the field.
S1-1 thru S1-4 Four-section SET-UP switch S1 sets the baud rate and parity for the RFL 9660's
LOCAL port; the number of data bits is fixed at eight.
Switch settings for S1 are given in Table 8-1. When viewed from the front of the
RFL 9660, ON is down and OFF is up.
S3-1 thru S3-7 S3-1 through S3-7 set the communications parameters for the RFL 9660 modem or direct
digital port. S3-1 through S3-3 set the baud rate, S3-4 and S3-5 set the parity, S3-6 sets
the word length, and S3-7 sets the number of stop bits.
Table 8-2 lists the valid switch settings for S3-1 through S3-7 when the RFL 9660 is
equipped with a modem; if the RFL 9660 has a direct digital I/O module, the switch
settings are given in Table 8-3. To use these tables, look up the baud rate you wish to set
the port to, and then find the parity, word length, and stop bit settings that you need. When
you find the row in the table that matches your requirements, set S3-1 through S3-7 as
shown on that row.
NOTE
RFL 9660 RFL Electronics Inc.
April 24, 2007 8-1 (973) 334-3100
The setting combinations listed in Table 8-2 are the only ones that are valid when the
RFL 9660 is equipped with a modem. Any other combination setting may result in modem
misoperation.
S3-8 S3-8 controls the RFL 9660's internal diagnostic loop. Place S3-8 in the ON
position to disable the diagnostic loop; to enable the diagnostic loop, place S3-8
in the OFF position.
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